Class: Hash

Inherits:
Object
  • Object
show all
Defined in:
lib/core_ext/hash.rb

Instance Method Summary collapse

Instance Method Details

#deep_merge(other_hash) ⇒ Object

recursive merging (aka deep merge) taken from ActiveSupport::CoreExtensions::Hash::DeepMerge



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# File 'lib/core_ext/hash.rb', line 23

def deep_merge(other_hash)
  self.merge(other_hash) do |key, oldval, newval|
    oldval = oldval.to_hash if oldval.respond_to?(:to_hash)
    newval = newval.to_hash if newval.respond_to?(:to_hash)
    oldval.class.to_s == 'Hash' && newval.class.to_s == 'Hash' ? oldval.deep_merge(newval) : newval
  end
end

#deep_merge!(other_hash) ⇒ Object 



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# File 'lib/core_ext/hash.rb', line 31

def deep_merge!(other_hash)
  replace(deep_merge(other_hash))
end

#pick(*keys) ⇒ Object

convert self into a hash, but only include the specified keys



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# File 'lib/core_ext/hash.rb', line 10

def pick(*keys)
  keys.map(&:to_s).inject({}) do |hsh, key|
    if has_key?(key)
      hsh[key] = self[key]
    end
    hsh
  end
end